diff --git a/test/mailers/domain_expire_mailer_test.rb b/test/mailers/domain_expire_mailer_test.rb
index ba7c75b61..22e22f0ec 100644
--- a/test/mailers/domain_expire_mailer_test.rb
+++ b/test/mailers/domain_expire_mailer_test.rb
@@ -34,7 +34,7 @@ class DomainExpireMailerTest < ActionMailer::TestCase
     email_address = domain.registrar.email
     assert_not domain.force_delete_scheduled?
     travel_to Time.zone.parse('2010-07-05')
-    email = 'some@strangesentence@internet.ee'
+    email = '`@internet.ee'
 
     Truemail.configure.default_validation_type = :regex
 
diff --git a/test/models/contact_test.rb b/test/models/contact_test.rb
index 3c0669890..4a598b0c7 100644
--- a/test/models/contact_test.rb
+++ b/test/models/contact_test.rb
@@ -94,7 +94,7 @@ class ContactTest < ActiveJob::TestCase
     Truemail.configure.default_validation_type = :regex
 
     contact = valid_contact
-    contact.email = 'some@strangesentence@internet.ee'
+    contact.email = '`@internet.ee'
     assert contact.invalid?
     assert_equal I18n.t('activerecord.errors.models.contact.attributes.email.email_regex_check_error'), contact.errors.messages[:email].first
   end
diff --git a/test/models/domain/force_delete_test.rb b/test/models/domain/force_delete_test.rb
index 1ee0bc77e..000694673 100644
--- a/test/models/domain/force_delete_test.rb
+++ b/test/models/domain/force_delete_test.rb
@@ -363,7 +363,7 @@ class ForceDeleteTest < ActionMailer::TestCase
     @domain.update(valid_to: Time.zone.parse('2012-08-05'))
     assert_not @domain.force_delete_scheduled?
     travel_to Time.zone.parse('2010-07-05')
-    email = 'some@strangesentence@internet.ee'
+    email = '`@internet.ee'
     asserted_text = "Invalid email: #{email}"
 
     Truemail.configure.default_validation_type = :regex
@@ -389,8 +389,8 @@ class ForceDeleteTest < ActionMailer::TestCase
     @domain.update(valid_to: Time.zone.parse('2012-08-05'))
     assert_not @domain.force_delete_scheduled?
     travel_to Time.zone.parse('2010-07-05')
-    email_one = 'one@strangesentence@internet.ee'
-    email_two = 'two@strangesentence@internet.ee'
+    email_one = '`@internet.ee'
+    email_two = '@@internet.ee'
     asserted_text_one = "Invalid email: #{email_one}"
     asserted_text_two = "Invalid email: #{email_two}"
 
@@ -420,7 +420,7 @@ class ForceDeleteTest < ActionMailer::TestCase
     @domain.update(valid_to: Time.zone.parse('2012-08-05'))
     assert_not @domain.force_delete_scheduled?
     travel_to Time.zone.parse('2010-07-05')
-    email = 'some@strangesentence@internet.ee'
+    email = '`@internet.ee'
 
     Truemail.configure.default_validation_type = :regex
 
diff --git a/test/models/registrar_test.rb b/test/models/registrar_test.rb
index e7d53e075..6c49b9099 100644
--- a/test/models/registrar_test.rb
+++ b/test/models/registrar_test.rb
@@ -74,7 +74,7 @@ class RegistrarTest < ActiveJob::TestCase
     Truemail.configure.default_validation_type = :regex
 
     registrar = valid_registrar
-    registrar.email = 'some@strangesentence@internet.ee'
+    registrar.email = '`@internet.ee'
     registrar.billing_email = nil
 
     assert registrar.invalid?
@@ -112,7 +112,7 @@ class RegistrarTest < ActiveJob::TestCase
     Truemail.configure.default_validation_type = :regex
 
     registrar = valid_registrar
-    registrar.billing_email = 'some@strangesentence@internet.ee'
+    registrar.billing_email = '`@strangesentence@internet.ee'
 
     assert registrar.invalid?
     assert_equal I18n.t('activerecord.errors.models.contact.attributes.email.email_regex_check_error'), registrar.errors.messages[:billing_email].first